名詞 regression:

1. an abnormal state in which development has stopped prematurely
   同義詞：arrested development, fixation, infantile fixation
2. (psychiatry) a defense mechanism in which you flee from reality by assuming a more infantile state
3. the relation between selected values of x and observed values of y (from which the most probable value of y can be predicted for any value of x)
   同義詞：simple regression, regression toward the mean, statistical regression
4. returning to a former state
   同義詞：regress, reversion, retrogression, retroversion

re.gres.sion

n.（名詞）
Reversion; retrogression.
恢復(fù)；退化
Relapse to a less perfect or developed state.
后退：退回到不完美或較不發(fā)達的狀態(tài)
Psychology Reversion to an earlier or less mature pattern of feeling or behavior.
【心理學(xué)】 回歸：退回到較早的或較不成熟的感情或行為方式
Biology The return of a population to an earlier or less complex physical type in successive generations.
【生物學(xué)】 退化：種群在連續(xù)幾代中退回以前的或較簡單的身體結(jié)構(gòu)
Statistics The relationship between the mean value of a random variable and the corresponding values of one or more independent variables.
【統(tǒng)計學(xué)】 回歸：隨機變量的平均值和相應(yīng)的一個或多個獨立變量的值之間的關(guān)系
Astronomy Retrograde motion of a celestial body.
【天文學(xué)】 退行：天體的逆行的動態(tài)